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Surveys of damage agents affecting young tree genetics research plantations and seed orchards in Alberta and a summary of control treatments

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The results of the surveys reported here provide a summary of the biotic and abiotic agents affecting cones, seedlings and trees, gives a distributional summary of damage agents according to... More ≫

Description

The results of the surveys reported here provide a summary of the biotic and abiotic agents affecting cones, seedlings and trees, gives a distributional summary of damage agents according to plantation sites established within the province up to 1994, and indicates the relative importance of each agent. The report also provides a listing of unpublished technical reports that resulted from the work described here and can be referred to for further details where necessary.

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Patterns of optimal growth for white spruce provenances in Alberta

Description

This paper describes the pattern of genetic variation for growth potential among white spruce provenances in Alberta. It uses total height and diameter at breast height at 27-years from seed to... More ≫

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This paper describes the pattern of genetic variation for growth potential among white spruce provenances in Alberta. It uses total height and diameter at breast height at 27-years from seed to identify provenance differences in relation to latitude and elevation of weed origin. Latitude and elevation are the main variables that adequately describe climatic variability in Alberta.

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Growth intercept models for assessing the site potential of young lodgepole pine stands in Alberta

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Forest management practices related to tree harvesting and regeneration in Alberta have historically attempted to replicate the effects of natural disturbance patterns. In order to maintain a... More ≫

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Forest management practices related to tree harvesting and regeneration in Alberta have historically attempted to replicate the effects of natural disturbance patterns. In order to maintain a sustained yield, and an ecosystem based sustainable forest management practice that aims at duplicating or potentially exceeding natural forest yields, and that emphasizes the maintenance of diversity among forest types, an assessment of the regeneration performance on the harvested areas is required. This assessment includes the quantification of regenerated site potentials, as commonly measured by site index. Growth intercept models were developed in this study to estimate site index based on a few years of juvenile height growth above a conveniently selected base height. In addition to being able to be used to predict site index in juvenile stands, these growth intercept models can also be used as the basis for projecting regenerated yields, evaluating silvicultural alternatives, and...

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